KR101850094B1 - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device capable of improving transmittance, side viewability, and display characteristics, and a liquid crystal display device according to the present invention includes a first substrate; A first switching element and a second switching element formed on the first substrate and switched by the same signal; A first sub-pixel electrode connected to the first switching device; A second sub-pixel electrode connected to the second switching element; A third switching device connected to the second switching device; A third sub-pixel electrode connected to the third switching device; A second sustain electrode formed to overlap with a central portion of the first sub-pixel electrode; A second substrate; A common electrode formed on the second substrate; And a liquid crystal layer formed between the first substrate and the second substrate.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of improving transmittance, side viewability, and display characteristics.

2. Description of the Related Art A liquid crystal display device is one of the most widely used flat panel display devices and is composed of two display panels having an electric field generating electrode such as a pixel electrode and a common electrode and a liquid crystal layer interposed therebetween. Thereby generating an electric field in the liquid crystal layer, thereby determining the orientation of the liquid crystal molecules in the liquid crystal layer and controlling the polarization of the incident light to display an image.

The liquid crystal display device further includes a switching element connected to each pixel electrode, and a plurality of signal lines such as a gate line and a data line for controlling the switching element to apply a voltage to the pixel electrode.

Among such liquid crystal display devices, a vertically aligned mode liquid crystal display device in which the long axis of liquid crystal molecules is arranged perpendicular to the display panel in the absence of an electric field has been spotlighted because of a large contrast ratio and a wide viewing angle. Herein, the reference viewing angle means a viewing angle with a contrast ratio of 1:10 or a luminance reversal limit angle between gradations.

In the case of this type of liquid crystal display device, a method of dividing one pixel into two sub-pixels and applying different voltages to the two sub-pixels has been proposed in order to make the side visibility close to the front viewability. In this case, according to the method of applying different voltages to two sub-pixels using different data lines, the data driving circuit is used twice as much as the conventional one, which increases the cost.

To solve this problem, a method has been proposed in which the same data line is connected to two sub-pixels, and the voltage of one of the two sub-pixels is lowered by using a separate switching element and a capacitor. However, when such a method is used, there is a problem that the transmittance is lowered compared to the same aperture ratio.

In addition, in order to realize a wide viewing angle, such a liquid crystal display device may form a plurality of domains having different orientations of liquid crystals in one pixel. As a means for forming a plurality of domains in one pixel, there is a photo alignment method of controlling the alignment direction and the alignment angle of the liquid crystal by irradiating light to the alignment film. In the photo alignment method, it is not necessary to form a cut-out portion in the field generating electrode, so that not only the aperture ratio can be increased, but also the response time of the liquid crystal can be improved by the pretilt angle generated in the photo alignment.

However, at the boundaries of different domains, portions of the liquid crystal alignment direction are different from each other, and a texture may be generated at that portion. Such a texture not only lowers the transmittance but also is visually recognized as a stain from the outside, which may deteriorate display characteristics.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid crystal display device having high transmittance and improved lateral visibility.

It is another object of the present invention to provide a thin film transistor display panel capable of improving display characteristics by shielding a portion where a texture is generated, and a liquid crystal display using the same.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a first substrate; A first switching element and a second switching element formed on the first substrate and switched by the same signal; A first sub-pixel electrode connected to the first switching device; A second sub-pixel electrode connected to the second switching element; A third switching device connected to the second switching device; A third sub-pixel electrode connected to the third switching device; A second sustain electrode formed to overlap with a central portion of the first sub-pixel electrode; A second substrate; A common electrode formed on the second substrate; And a liquid crystal layer formed between the first substrate and the second substrate.

The liquid crystal display according to an embodiment of the present invention may further include a first gate line, a second gate line, and a data line formed on the first substrate, wherein the first switching device and the second switching device include The third switching element may be connected to the second gate line, and the second sustain electrode may be formed in the same direction as the first gate line.

The liquid crystal display according to an embodiment of the present invention may further include a first sustain electrode formed to overlap with at least one of left and right ends of the first sub-pixel electrode and connected to the second sustain electrode, have.

The liquid crystal display according to an embodiment of the present invention may further include a first sustain electrode line formed on the first sub-pixel electrode and connected to the first sustain electrode.

The liquid crystal display according to an embodiment of the present invention may further include a second sustain electrode line formed to overlap with a center portion of the second sub-pixel electrode.

The second sustain electrode line may be formed in the same direction as the first gate line.

The liquid crystal display device according to an embodiment of the present invention may further include a third sustain electrode protruding from the second sustain electrode line and formed to overlap with at least one of the left and right end portions of the second sub- .

The liquid crystal display according to an embodiment of the present invention may further include a fifth sustain electrode formed to overlap with a center portion of the third sub-pixel electrode.

The fifth sustain electrode may be formed in the same direction as the second gate line.

And a fourth sustain electrode formed to overlap the at least one of the left and right ends of the third sub-pixel electrode and connected to the fifth sustain electrode.

And a third sustain electrode line formed below the third sub-pixel electrode and connected to the fourth sustain electrode.

A third sustain electrode line formed below the third sub-pixel electrode; A fourth sustain electrode overlapping at least one of the left and right ends of the third sub-pixel electrode and connected to the third sustain electrode line; And a fifth sustain electrode overlapped with a central portion of the third sub-pixel electrode and connected to the fourth sustain electrode and formed in the same direction as the second gate line.

Wherein the second gate line is located below the first gate line, the first sub-pixel electrode is located above the first gate line, and the second sub-pixel electrode is located below the first gate line and the second gate line And the third sub-pixel electrode may be located below the second gate line.

The voltage of the first sub-pixel electrode may be higher than the voltage of the second sub-pixel electrode, and the voltage of the second sub-pixel electrode may be higher than the voltage of the third sub-pixel electrode.

The voltage ratio of the first sub-pixel electrode, the second sub-pixel electrode, and the third sub-pixel electrode may be 1: 0.6 or more and 0.9 or less: 0.5 or more and 0.9 or less.

The area ratio of the first sub-pixel electrode, the second sub-pixel electrode, and the third sub-pixel electrode may be 1: 0.8 or more and 2.5 or less: 0.8 or more and 5.0 or less.

A liquid crystal display device according to an embodiment of the present invention includes: a first alignment layer formed by irradiating light onto the first substrate in different directions; And a second alignment layer formed on the second substrate by irradiating light in different directions, and the second sustain electrode is formed by irradiating the first alignment layer and the second alignment layer with light in mutually different directions Lt; RTI ID = 0.0 > and / or < / RTI >

The liquid crystal display according to an embodiment of the present invention may further include a gate line and a data line formed on the first substrate, wherein the first switching element and the second switching element are connected to the gate line and the data line And the third switching element includes an input terminal connected to the second switching element and a floating control terminal, and the second sustain electrode may be formed in the same direction as the first gate line.

The liquid crystal display according to an embodiment of the present invention includes a first sustain electrode formed to overlap with at least one of left and right ends of the first sub-pixel electrode and connected to the second sustain electrode; And a first sustain electrode line formed on the first sub-pixel electrode and connected to the first sustain electrode.

The liquid crystal display according to an embodiment of the present invention includes a second sustain electrode line formed to overlap with a central portion of the second sub-pixel electrode; And a third sustain electrode protruding from the second sustain electrode line and overlapping at least one of left and right end portions of the second sub-pixel electrode, wherein the second sustain electrode line is formed in the same direction as the gate line As shown in FIG.

The liquid crystal display device according to the present invention as described above has the following effects.

The liquid crystal display device according to the present invention has an effect of improving transmittance and visibility.

Further, when the alignment film is formed by the photo alignment method, a portion where a texture is generated is shielded, thereby improving display characteristics.

1 is an equivalent circuit diagram of one pixel of a liquid crystal display according to a first embodiment of the present invention.
2 is a layout diagram of a lower panel of a liquid crystal display according to a first embodiment of the present invention.
3 is a layout diagram of a lower panel of a liquid crystal display according to a second embodiment of the present invention.
4 is a layout view of a lower panel of a liquid crystal display according to a third embodiment of the present invention.
5 is a layout diagram of a lower panel of a liquid crystal display according to a fourth embodiment of the present invention.
6 is a bar graph showing GDI according to the texture blind condition.
7 is a graph showing VT curves at the front and side in accordance with the texture occlusion condition.
8 is an equivalent circuit diagram of one pixel of a liquid crystal display according to a fifth embodiment of the present invention.
9 is a layout diagram of a lower panel of a liquid crystal display according to a fifth embodiment of the present invention.
10 is a layout diagram of a lower panel of a liquid crystal display according to a sixth embodiment of the present invention.
11 is a layout diagram of a lower panel of a liquid crystal display according to a seventh embodiment of the present invention.
12 is a layout diagram of a lower panel of a liquid crystal display according to an eighth embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the drawings, the thickness is enlarged to clearly represent the layers and regions. Like parts are designated with like reference numerals throughout the specification. It will be understood that when an element such as a layer, film, region, plate, or the like is referred to as being "on" another portion, it includes not only the element directly over another element, Conversely, when a part is "directly over" another part, it means that there is no other part in the middle.

First, a liquid crystal display according to a first embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an equivalent circuit diagram of a pixel of a liquid crystal display device according to a first embodiment of the present invention, and FIG. 2 is a layout diagram of a lower panel of a liquid crystal display device according to the first embodiment of the present invention.

1, the liquid crystal display according to the first embodiment of the present invention includes a first switching device Qa and a second switching device Qb, a first liquid crystal capacitor Cb connected to the first switching device Qa, A second liquid crystal capacitor Clc connected to the second switching device Qb, a third switching device Qc connected to the second switching device Qb, and a third switching device Qc connected to the third switching device Qc. A transformer capacitor Ct, and a third liquid crystal capacitor Clcc connected to the transformer capacitor Ct.

The liquid crystal display according to the first embodiment of the present invention further includes a first gate line GLn, a second gate line GLn + 1, and a data line DL. The first switching element Qa and the second switching element Qb are three terminal elements such as a thin film transistor which are connected to the first gate line GLn and switched by the same signal and connected to the data line DL The same data signal is applied. The third switching element Qc is a three-terminal element such as a thin film transistor and is connected to the second gate line GLn + 1.

When the gate-on voltage is applied to the first gate line GLn, the first switching device Qa and the second switching device Qb are turned on and the same data signal is applied through the data line DL, One liquid crystal capacitor Clca and the second liquid crystal capacitor Clcb are charged with the same voltage. Then, when the gate-on voltage is applied to the second gate line GLn + 1, which is the gate line of the next stage, the third switching element Qc is turned on, and a part of the voltage charged in the second liquid crystal capacitor Clcb is And is discharged to the transformer capacitor Ct and the third liquid crystal capacitor Clcc. Therefore, a difference between the voltages charged in the first liquid crystal capacitor Clca and the second liquid crystal capacitor Clcb is generated. Since the voltage that has escaped from the second liquid crystal capacitor Clcb is divided into the voltage accumulator Ct and the third liquid crystal capacitor Clcc, the voltage charged in the second liquid crystal capacitor Clcb and the voltage of the third liquid crystal capacitor Clcc And therefore, the lateral visibility of the liquid crystal display device can be improved.

The structure of the liquid crystal display according to the first embodiment of the present invention includes a plurality of first gate lines (not shown) formed on a first substrate (not shown) made of transparent glass or plastic 121a, and a second gate line 121b are formed.

The first and second gate lines 121a and 121b transmit gate signals and extend mainly in the horizontal direction. The first gate line 121a and the second gate line 121b are alternately arranged and the gate-on voltage is sequentially applied to the first gate line 121a and the second gate line 121b.

The first gate line 121a includes a plurality of first gate electrodes 124a and second gate electrodes 124b protruding upward and downward, respectively. The first gate electrode 124a and the second gate electrode 124b receive the same gate signal from the first gate line 121a. The second gate line 121b includes a plurality of third gate electrodes 124c protruding therefrom.

The first, second, and third storage electrode lines 131a, 131b, and 131c are formed apart from the first and second gate lines 121a and 121b. The first, second, and third sustain electrode lines 131a, 131b, and 131c are applied with a predetermined voltage and extend substantially in parallel with the first and second gate lines 121a and 121b. At this time, the first, second, and third sustain electrode lines 131a, 131b, and 131c may be formed in the same layer as the first and second gate lines 121a and 121b. The first, second, and third sustain electrode lines 131a, 131b, and 131c include first, second, third, and fourth sustain electrodes 133a, 133b, 133c, and 133d extending therefrom.

The first, second, and third sustain electrode lines 131a, 131b, and 131c and the first, second, third, and fourth sustain electrodes 133a, 133b, 133c, 2, and the third sub-pixel electrodes 191a, 191b, and 191c will be described in more detail.

A gate insulating layer (not shown) is formed on the first and second gate lines 121a and 121b. A island-shaped semiconductor (not shown) is formed on the gate insulating film. The semiconductor is located above the first, second, and third gate electrodes 124a, 124b, and 124c.

A plurality of data lines 171, a first source electrode 173a, a second source electrode 173b, a third source electrode 173c and a first drain electrode 173b are formed on the semiconductor and gate insulating films. a drain electrode 175a, a second drain electrode 175b, and a third drain electrode 175c are formed.

The data line 171 carries a data signal and mainly extends in the longitudinal direction to cross the first and second gate lines 121a and 121b.

The first source electrode 173a protrudes from the data line 171 to the first gate electrode 124a and the second source electrode 173b protrudes from the data line 171 to the second gate electrode 124b. And the first source electrode 173a and the second source electrode 173b are connected in a single configuration so that the same data voltage is applied from the data line 171. [ The first source electrode 173a is formed in a U shape on the first gate electrode 124a and the second source electrode 173b is formed in a U shape on the second gate electrode 124b.

The first drain electrode 175a is spaced apart from the first source electrode 173a and includes a rod end facing the first source electrode 173a around the first gate electrode 124a, The end portion is partially surrounded by the U-shaped first source electrode 173a.

The second drain electrode 175b is spaced apart from the second source electrode 173b and includes a rod-shaped end portion facing the second source electrode 173b around the second gate electrode 124b, And the end portion is partially surrounded by the second source electrode 173b bent in a U-shape. And the other end of the second drain electrode 175b is connected to the third source electrode 173c.

The third source electrode 173c extends from the second drain electrode 175b and is formed in a U shape on the third gate electrode 124c. The third drain electrode 175c is spaced apart from the third source electrode 173c and includes a rod-shaped end portion facing the third source electrode 173c around the third gate electrode 124c, The end portion is partially surrounded by the third source electrode 173c curved in a U-shape.

The first gate electrode 124a, the first source electrode 173a and the first drain electrode 175a constitute a first switching device (Qa in FIG. 1), and the second gate electrode 124b, the second source electrode The third source electrode 173c and the third drain electrode 175c constitute the third switching element (Qb in FIG. 1), and the third gate electrode 124c, the third source electrode 173c and the third drain electrode 175c constitute the second switching element (Qc in Fig. 1).

A passivation layer is formed on the data line 171, the first, second and third source electrodes 173a, 173b and 173c and the first, second and third drain electrodes 175a, 175b and 175c. (Not shown) is formed. The protective film is made of an inorganic insulating material or an organic insulating material. The surface of the protective film can be flat, and the double-layer structure in which the lower layer is an inorganic film and the upper layer is an organic film .

A first contact hole 181a for exposing a part of the first drain electrode 175a and a second contact hole 181b for exposing a part of the second drain electrode 175b are formed in the protective film.

On the passivation layer, a first sub-pixel electrode 191a, a second sub-pixel electrode 191b, and a third sub-pixel electrode 191b are formed of a transparent electrode material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide) (Not shown). The first sub-pixel electrode 191a is connected to the first drain electrode 175a through the first contact hole 181a and the second sub-pixel electrode 191b is connected to the second drain electrode 175a through the second contact hole 181b. Drain electrode 175b and the third sub-pixel electrode 191c is not directly connected to the third drain electrode 175c.

The first sub-pixel electrode 191a is formed on the upper side of the first gate line 121a and the second sub-pixel electrode 191b is formed on the lower side of the first gate line 121a. The second sub-pixel electrode 191b is formed on the upper side of the second gate line 121b, and the third sub-pixel electrode 191c is formed on the lower side. That is, the second sub-pixel electrode 191b is formed between the first gate line 121a and the second gate line 121b. Here, the first sub-pixel electrode 191a, the second sub-pixel electrode 191b, and the third sub-pixel electrode 191c are all of the same size, but the present invention is not limited thereto, .

The first sustain electrode line 131a is formed on the upper side of the first sub pixel electrode 191a and the second sustain electrode line 131b is formed to overlap the central portion of the second sub pixel electrode 191b, Pixel electrode 131c is formed below the third sub-pixel electrode 191c.

The first sustain electrode 133a protrudes from the first sustain electrode line 131a and is formed so as to at least partially overlap the left and right ends of the first sub-pixel electrode 191a.

The second sustain electrode 133b is formed in a direction parallel to the first gate line 121a so as to overlap the central portion of the first sub-pixel electrode 191a. The second sustain electrode 133b is formed to connect the first sustain electrode 133a formed on the left side of the first sub-pixel electrode 191a and the first sustain electrode 133a formed on the right side.

At this time, the first sustain electrode 133a may be formed to overlap at least a part of either the left or right end of the first sub-pixel electrode 191a. At this time, the second sustain electrode 133b is formed to be connected to the first sustain electrode 133a formed on only one side.

The third sustain electrode 133c protrudes from the second sustain electrode line 131b and is formed so as to at least partially overlap the left and right end portions of the second sub-pixel electrode 191b.

The fourth sustain electrode 133d protrudes from the third sustain electrode line 131c and is formed so as to at least partially overlap the left and right ends of the third sub-pixel electrode 191c.

At this time, the third and fourth sustain electrodes 133c and 133d may be formed to overlap at least a part of either the left or right end of the second and third sub-pixel electrodes 191b and 191c, respectively.

The shape and arrangement of the first, second, and third sustain electrode lines 131a, 131b, 131c and the first, second, third, and fourth sustain electrodes 133a, 133b, 133c, It can be transformed into branches.

The data voltage input to the data line 171 continuously changes with time, and this affects the voltages of the first, second, and third sub-pixel electrodes 191a, 191b, and 191c. The first sustain electrode 133a, the third sustain electrode 133c and the fourth sustain electrode 133d are adjacent to the data line 171 and are connected to the first, second and third sub-pixel electrodes 191a, 191b, 191c, at least partially overlapping each other.

The alignment film can be formed on the first and second substrates of the liquid crystal display device according to the present invention and light alignment can be performed by controlling the alignment direction and the alignment angle of the liquid crystal by irradiating the alignment film with light. According to the photo-alignment method, the aperture ratio can be increased and the response speed of the liquid crystal can be improved. On the other hand, at the boundaries of different domains, portions having different orientations of the liquid crystal exist, .

In FIG. 5, a portion indicated by B is a region where a texture is generated, and the luminance is displayed higher than other regions. Therefore, it is possible to reduce the influence of the texture by covering the corresponding portion. The liquid crystal is laid at zero in the vertical line portion across the center of the first, second, and third sub-pixel electrodes 191a, 191b, and 191c, The difference seems not large. On the other hand, the horizontal line portion across the center of the first, second, and third sub-pixel electrodes 191a, 191b, and 191c has the liquid crystal at 90 degrees, and the luminance difference from the other regions is large.

Therefore, the second sustain electrode 133b and the second sustain electrode line 131b are formed so as to cover the horizontal line portion crossing the center of the first and second sub-pixel electrodes 191a and 191b, respectively, It is possible to prevent the influence of the texture generated in the sub-pixel electrodes 191a and 191b.

Although not shown, common electrodes are formed on a second substrate facing the first substrate, and a liquid crystal layer is formed between the first substrate and the second substrate.

The first sub-pixel electrode 191a and the second sub-pixel electrode 191b form a first and second liquid crystal capacitors (Clca and Clcb in FIG. 1) together with a common electrode formed on the second substrate and a liquid crystal layer therebetween The applied voltage is maintained even after the first and second switching elements Qa and Qb are turned off. A protective film is formed between the third drain electrode 175c and the third sub-pixel electrode 191c to form a transformer capacitor (Ct in FIG. 1). A liquid crystal layer (not shown) is formed between the third sub-pixel electrode 191c and the common electrode to form a third liquid crystal capacitor (Clcc in Fig. 1).

The first liquid crystal capacitor Clca, the second liquid crystal capacitor Clcb, and the second liquid crystal capacitor Clc are discharged as a part of the voltage charged in the second liquid crystal capacitor Clcb is discharged to the transformer capacitor Ct and the third liquid crystal capacitor Clcc. A difference in voltage charged in the third liquid crystal capacitor Clcc is generated, and the side viewability can be improved.

Next, a liquid crystal display according to a second embodiment of the present invention will be described with reference to the accompanying drawings.

The main difference from the first embodiment is that the second sustain electrode line and the third sustain electrode included in the first embodiment are not formed in the second embodiment, and will be described in more detail below.

3 is a layout diagram of a lower panel of a liquid crystal display according to a second embodiment of the present invention.

The liquid crystal display device according to the second embodiment of the present invention is the same as the liquid crystal display device according to the first embodiment, and a description thereof will be omitted and only differences will be described below.

The liquid crystal display according to the second embodiment of the present invention is formed with first and third sustain electrode lines 131a and 131c spaced apart from the first and second gate lines 121a and 121b as shown in FIG. . The first and third sustain electrode lines 131a and 131c are applied with a predetermined voltage and extend substantially in parallel with the first and second gate lines 121a and 121b. In addition, the first, second, and fourth sustain electrodes 133a, 133b, and 133d are formed at the same positions as in the first embodiment, and their shapes and arrangements can be modified in various ways.

At this time, since the second sustain electrode 133b is formed so as to cover the horizontal line portion crossing the center of the first sub-pixel electrode 191a, it is possible to prevent the influence due to the texture generated in the first sub-pixel electrode 191a have.

In the liquid crystal display device according to the second embodiment of the present invention, no sustain electrode line is formed to cross the center portion of the second sub-pixel electrode 191b. Therefore, compared with the first embodiment, As the area is reduced, the transmittance can be further increased.

Next, a liquid crystal display according to a third embodiment of the present invention will be described with reference to the accompanying drawings.

The greatest difference from the first embodiment is that, in the third embodiment, a sustain electrode covering a part of the third sub-pixel electrode 191c is additionally formed, which will be described in more detail below.

4 is a layout view of a lower panel of a liquid crystal display according to a third embodiment of the present invention.

Since the liquid crystal display device according to the third embodiment of the present invention is the same as the liquid crystal display device according to the first embodiment, a description thereof will be omitted and only differences will be described below.

4, the liquid crystal display according to the third embodiment of the present invention includes first, second, and third sustain electrode lines 131a and 131b (not shown) spaced apart from the first and second gate lines 121a and 121b, And 131c are formed. The first, second, and third sustain electrode lines 131a, 131b, and 131c are applied with a predetermined voltage and extend substantially in parallel with the first and second gate lines 121a and 121b. In addition, the first, second, third, and fourth sustain electrodes 133a, 133b, 133c, and 133d are formed at the same positions as in the first embodiment, and their shapes and arrangements can be modified in various ways.

Furthermore, a fifth sustain electrode 133e is formed in a direction parallel to the second gate line 121b so as to overlap the central portion of the third sub-pixel electrode 191c. The fifth sustain electrode 133e is formed to connect the fourth sustain electrode 133d formed on the left side of the third sub-pixel electrode 191c and the fourth sustain electrode 133d formed on the right side.

The fifth sustain electrode 133e may be formed to overlap at least a part of either the left or right end of the third sub-pixel electrode 191c. At this time, the fifth sustain electrode 133e is formed to be connected to the fourth sustain electrode 133d formed on only one side.

In the liquid crystal display device according to the third embodiment of the present invention, the fifth sustain electrode 133e is formed so as to cross the center of the third sub-pixel electrode 191c, Can be prevented.

Next, a liquid crystal display according to a fourth embodiment of the present invention will be described with reference to the accompanying drawings.

The main difference from the first embodiment is that in the fourth embodiment, the second sustain electrode line and the third sustain electrode, which were included in the first embodiment, are not formed, and a portion of the third sub-pixel electrode 191c Electrode is additionally formed, which will be described in more detail below.

5 is a layout diagram of a lower panel of a liquid crystal display according to a fourth embodiment of the present invention.

Since the liquid crystal display device according to the fourth embodiment of the present invention is the same as the liquid crystal display device according to the first embodiment, description thereof will be omitted and only differences will be described below.

The liquid crystal display according to the fourth embodiment of the present invention is formed with first and third sustain electrode lines 131a and 131c spaced apart from the first and second gate lines 121a and 121b as shown in FIG. . The first and third sustain electrode lines 131a and 131c are applied with a predetermined voltage and extend substantially in parallel with the first and second gate lines 121a and 121b. In addition, the first, second, and fourth sustain electrodes 133a, 133b, and 133d are formed at the same positions as in the first embodiment, and their shapes and arrangements can be modified in various ways.

Furthermore, a fifth sustain electrode 133e is formed in a direction parallel to the second gate line 121b so as to overlap the central portion of the third sub-pixel electrode 191c. The fifth sustain electrode 133e is formed to connect the fourth sustain electrode 133d formed on the left side of the third sub-pixel electrode 191c and the fourth sustain electrode 133d formed on the right side.

The fifth sustain electrode 133e may be formed to overlap at least a part of either the left or right end of the third sub-pixel electrode 191c. At this time, the fifth sustain electrode 133e is formed to be connected to the fourth sustain electrode 133d formed on only one side.

In the liquid crystal display device according to the fourth embodiment of the present invention, the second sustain electrode 133b and the fifth sustain electrode 133e are connected to a horizontal line portion extending across the center of the first and third sub-pixel electrodes 191a and 191c, The influence due to the texture generated in the first and third sub-pixel electrodes 191a and 191c can be prevented.

In the liquid crystal display according to the first to fourth embodiments of the present invention, the first, second, and third sub-pixel electrodes have different voltages to represent three gray scales. In the above embodiments, the voltage of the first sub-pixel electrode is higher than the voltage of the second sub-pixel electrode, and the voltage of the second sub-pixel electrode is higher than the voltage of the third sub-pixel electrode.

The voltage ratio of the first, second, and third sub-pixel electrodes is preferably 1: 0.6 or more and 0.9 or less: 0.5 or more and 0.9 or less. The area ratio of the first, second, and third sub-pixel electrodes is preferably 1: 0.8 or more and 2.5 or less: 0.8 or more and 5 or less.

In the liquid crystal display device according to the first to fourth embodiments of the present invention, the first sub-pixel electrode having the highest voltage is arranged on the uppermost side, and the second and third sub-pixel electrodes are arranged on the lower side in order. However, the present invention is not limited to this, and the arrangement of the first, second, and third sub-pixel electrodes may be variously changed.

In the first to fourth embodiments of the present invention, a sustain electrode or a sustain electrode line is formed at a central portion of any one of the first, second, and third sub-pixel electrodes to cover a portion where a texture is generated. In the first embodiment, the second sustain electrode is formed to cross the center of the first sub-pixel electrode. In the second embodiment, the second sustain electrode and the second sustain electrode are formed so as to cross the center of the first and second sub- A sustain electrode line is formed. In the third embodiment, the second sustain electrode, the second sustain electrode line, and the fifth sustain electrode are formed so as to cross the center of the first, second, and third sub-pixel electrodes. In the fourth embodiment, And the second sustain electrode and the fifth sustain electrode are formed to cross the center of the first sub-pixel electrode and the third sub-pixel electrode.

Hereinafter, the degrees of improvement in lateral visibility in the liquid crystal display devices according to the first to fourth embodiments will be compared with each other with reference to Table 1, Fig. 6, and Fig.

Table 1 shows the GDI according to the texture blind condition, voltage ratio, and area ratio. FIG. 6 is a bar graph showing GDI according to a texture blind condition, and FIG. 7 is a graph showing a V-T curve at a front and a side according to a texture blind condition.

GDI is a numerical value of side visibility. The smaller the value, the better the side visibility. The GDI shows a lower value as the V-T curve on the side approaches the V-T curve on the front side.

turn Texture occluded condition (1: occluded, 0: not occluded) Voltage ratio Area ratio GDI The first sub- The second sub- The third sub- The first sub- The second sub- The third sub- The first sub- The second sub- The third sub- One 0 0 One 0.75 One 2 0.275 2 One 0 One 0.75 One 2 0.256 3 0 0 0 One 0.75 0.5 One One One 0.255 4 One 0 0 One 0.75 0.5 One One One 0.237 5 0 One 0 One 0.75 0.5 One One One 0.259 6 0 0 One One 0.75 0.5 One One One 0.262 7 One One 0 One 0.75 0.5 One One One 0.234 8 One 0 One One 0.75 0.5 One One One 0.237 9 0 One One One 0.75 0.5 One One One 0.259 10 One One One One 0.75 0.5 One One One 0.242 11 0 0 0 One 0.75 0.5 One 1.5 1.5 0.233 12 One 0 0 One 0.75 0.5 One 1.5 1.5 0.216 13 0 One 0 One 0.75 0.5 One 1.5 1.5 0.236 14 0 0 One One 0.75 0.5 One 1.5 1.5 0.240 15 One One 0 One 0.75 0.5 One 1.5 1.5 0.217 16 One 0 One One 0.75 0.5 One 1.5 1.5 0.223 17 0 One One One 0.75 0.5 One 1.5 1.5 0.238 18 One One One One 0.75 0.5 One 1.5 1.5 0.221 19 0 0 0 One 0.8 0.6 One One One 0.267 20 One 0 0 One 0.8 0.6 One One One 0.249 21 0 One 0 One 0.8 0.6 One One One 0.269 22 0 0 One One 0.8 0.6 One One One 0.274 23 One One 0 One 0.8 0.6 One One One 0.245 24 One 0 One One 0.8 0.6 One One One 0.250 25 0 One One One 0.8 0.6 One One One 0.270 26 One One One One 0.8 0.6 One One One 0.253 27 0 0 0 One 0.8 0.6 One 1.5 1.5 0.250 28 One 0 0 One 0.8 0.6 One 1.5 1.5 0.234 29 0 One 0 One 0.8 0.6 One 1.5 1.5 0.250 30 0 0 One One 0.8 0.6 One 1.5 1.5 0.257 31 One One 0 One 0.8 0.6 One 1.5 1.5 0.230 32 One 0 One One 0.8 0.6 One 1.5 1.5 0.238 33 0 One One One 0.8 0.6 One 1.5 1.5 0.253 34 One One One One 0.8 0.6 One 1.5 1.5 0.239

Table 1 is as follows.

One pixel electrode is divided into two sub-pixel electrodes, and the two sub-pixel electrodes have different voltages when they are different from each other. In the case of the two pixel electrodes, one of the two sub- A case in which a texture appearing as a horizontal line is covered at the center of the first sub-pixel electrode. In the case of No.1 and No.2, the GDI is 0.275 and 0.256, respectively, which are somewhat higher values.

In case 3, one pixel electrode is divided into three sub-pixel electrodes, and the three sub-pixel electrodes have different voltages. In this case, the GDI is 0.255, which is similar to the case of the second case .

In case of No. 4, the texture appears as a horizontal line at the center of the first sub-pixel electrode having the highest voltage among the three sub-pixel electrodes. In this case, the GDI is 0.237, which is much lower than the first to third cases. That is, the side visibility is greatly improved.

In case of No. 5, the texture of the second sub-pixel electrode having a middle voltage among the three sub-pixel electrodes is covered by a horizontal line, and the GDI is 0.259, which is higher than the third.

In case of No. 6, a texture which appears as a horizontal line is covered at the center of the third sub-pixel electrode having the lowest voltage among the three sub-pixel electrodes. At this time, the GDI is 0.262, which is higher than the case of No. 3.

In case of No. 7, the texture of the first sub-pixel electrode having the highest voltage among the three sub-pixel electrodes and the second sub-pixel electrode having the medium-sized voltage is 0.234, Which is much lower than the case.

In the case of No. 8, the first sub-pixel electrode having the highest voltage and the third sub-pixel electrode having the lowest voltage among the three sub-pixel electrodes are covered with a horizontal line. In this case, the GDI is 0.237, Which is a much lower value than the above.

In the case of No. 9, the second sub-pixel electrode having the middle-sized voltage and the third sub-pixel electrode having the lowest voltage among the three sub-pixel electrodes are covered with a horizontal line, and the GDI is 0.259. Which is higher than the case.

In the case of the 10th case, all the textures appearing on the horizontal line are covered at the center of the three sub-pixel electrodes, which is GDI 0.242, which is much lower than that of the third case.

11-18 respectively have the same texture masking conditions as those of 3-10, and the GDI was measured by varying the area ratio of the first sub-pixel electrode to the third sub-pixel electrode. The area ratio of the first sub-pixel electrode, the second sub-pixel electrode, and the third sub-pixel electrode in the third to tenth aspects is 1: 1: 1, and the first sub- Electrode, and the third sub-pixel electrode is 1: 1.5: 1.5.

19-26 have the same texture blurring conditions as those of 3-10, respectively, and the GDI is measured by varying the voltage ratio of the first sub-pixel electrode to the third sub-pixel electrode. The voltage ratios of the first sub-pixel electrode, the second sub-pixel electrode, and the third sub-pixel electrode are 1: 0.75: 0.5, the first sub-pixel electrode at 19-26, Electrode, and the third sub-pixel electrode is 1: 0.8: 0.6.

27-34 have the same texture blurring conditions as those of 3-10, respectively, and the GDI was measured by varying the voltage ratio and the area ratio of the first sub-pixel electrode to the third sub-pixel electrode. The voltage ratios of the first sub-pixel electrode, the second sub-pixel electrode, and the third sub-pixel electrode in the third to tenth aspects are 1: 0.75: 0.5, the first sub- Electrode, and the third sub-pixel electrode is 1: 0.8: 0.6. The area ratios of the first sub-pixel electrode, the second sub-pixel electrode, and the third sub-pixel electrode are 1: 1: 1, the first sub-pixel electrode at 27-34, Electrode, and the third sub-pixel electrode is 1: 1.5: 1.5.

The GDI changes as the voltage ratio and / or the area ratio of the first sub-pixel electrode, the second sub-pixel electrode, and the third sub-pixel electrode are different from each other. If the voltages of the second sub-pixel electrode and the third sub-pixel electrode are increased, the GDI is reduced while the transmittance is improved. Since the visibility and the transmittance are in a trade-off relationship with each other, when it is necessary to further improve the visibility, the voltages of the second sub-pixel electrode and the third sub-pixel electrode are further lowered, The voltage of the pixel electrode and the third sub-pixel electrode can be further increased.

The GDI of 11-34 shows that even if the voltage ratio and / or the area ratio of the first to third sub-pixel electrodes, the second sub-pixel electrode, and the third sub-pixel electrode are different, Are similar to each other. That is, when the texture of the first sub-pixel electrode is obscured, the texture of the first and second sub-pixel electrodes is obscured, and the texture of the first and third sub-pixel electrodes is obscured, GDI tends to be lower than when textures are masked.

This tendency will be described with reference to FIG. 6, the non-patterned bar at the center represents the case where the texture is not selected as the comparative example 1 (No. 3 in Table 1), and the bars positioned on the left side thereof are the liquid crystal display according to the first to fourth embodiments Devices (7, 4, 8, 10 in Table 1), and the bars on the right represent Comparative Examples 2 to 4 (5, 9, 6 in Table 1), respectively. Compared with Comparative Example 1, the liquid crystal display devices according to the first to fourth embodiments of the present invention show a tendency to improve the side visibility and the side viewing visibility tends to decrease in the case of Comparative Example 2-4.

In the case of showing the lowest GDI according to the texture occlusion condition, the effect of improving the side visibility is greatest when the texture represented by the horizontal line is covered at the center of the first sub-pixel electrode and the second sub-pixel electrode as the first embodiment.

Hereinafter, side visibility in the first and second embodiments will be described with reference to FIG.

7 is a graph showing the V-T curves in the front and side views of the first and second embodiments of the present invention and the first comparative example.

The front VT curves of the first and second embodiments and the first comparative example are the same, and the side VT curves are different. At this time, the closer the side VT curve is to the front VT curve, the better the side visibility. In the first and second embodiments, since the side VT curve is closer to the front VT curve than the first embodiment, it can be seen that the liquid crystal display device of the present invention has an effect of improving side visibility. Furthermore, according to the first embodiment of the first embodiment and the second embodiment, since the side VT curve is closer to the front VT curve, the effect of improving the lateral visibility is also greater.

Next, a liquid crystal display according to a fifth embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 8 is an equivalent circuit diagram of a pixel of a liquid crystal display device according to a fifth embodiment of the present invention, and FIG. 9 is a layout diagram of a lower panel of the liquid crystal display device according to the fifth embodiment of the present invention.

Since the liquid crystal display according to the fifth embodiment of the present invention has many components similar to those of the liquid crystal display according to the first embodiment as shown in FIG. 8, a description thereof will be omitted and only differences will be described .

In the liquid crystal display device according to the fifth embodiment of the present invention, unlike the liquid crystal display device according to the first embodiment, no second gate line is formed, only the first gate line GLn is formed and the first switching device Qa, And the second switching element Qb. Since there is no distinction between the first gate line GLn and the second gate line, the first gate line GLn is expressed by a gate line in the claims related to the fifth embodiment.

The third switching element Qc is not connected to a separate gate line and the control terminal N1 is folated. The input terminal N3 is connected to the second switching element Qb. The output terminal N2 Is connected to the transformer capacitor Ct. In addition, the transformer capacitor Ct is connected to the third liquid crystal capacitor Clcc.

When the gate-on voltage is applied to the first gate line GLn, the first and second switching elements Qa and Qb connected thereto are turned on and the same data signal is applied through the data line DL, The liquid crystal capacitor Clca and the second liquid crystal capacitor Clcb are charged with the same voltage.

When the positive data voltage is applied through the data line DL, the voltage of the control terminal N1 becomes high while the positive data voltage is charged to the input terminal N3 of the third switching device Qc. Then, the current flows from the input terminal N3 of the third switching device Qc to the output terminal N2, and the voltage of the output terminal N2 also increases.

When the gate-off voltage is applied to the first gate line GLn, the voltage of the output terminal N2 of the third switching element Qc, the voltage of the input terminal N3, and the voltage of the control terminal N1 are equal to each other The current continues to flow from the input terminal N3 to the output terminal N2 until the voltage at the output terminal N2 rises. As a result, the voltage at the input terminal N3 falls and the voltage at the output terminal N2 rises. As a result, the voltage charged in the second liquid crystal capacitor Clcb connected to the input terminal N3 of the third switching device Qc becomes lower than the data voltage of the positive polarity initially applied, so that the first liquid crystal capacitor Clca is charged Lt; / RTI > Since the voltage that has escaped from the second liquid crystal capacitor Clcb is divided into the voltage accumulator Ct and the third liquid crystal capacitor Clcc, the voltage charged in the second liquid crystal capacitor Clcb and the voltage of the third liquid crystal capacitor Clcc And therefore, the lateral visibility of the liquid crystal display device can be improved.

Since the structure of the liquid crystal display according to the fifth embodiment of the present invention is similar to that of the liquid crystal display according to the first embodiment as shown in FIG. 9, a description thereof will be omitted, .

In the liquid crystal display device according to the fifth embodiment of the present invention, unlike the first embodiment, the second gate line is not formed separately, but only the first gate line 121a is formed.

The third gate electrode 124c is not connected to a separate gate line and is formed to float between the second sub-pixel electrode 191b and the third sub-pixel electrode 191c.

In the liquid crystal display according to the fifth embodiment, the second sub-pixel electrode 191b and the third sub-pixel electrode 191b are formed by using the third switching element (Qc in Fig. 8) in which the control terminal is floated and the transformer capacitor By forming a voltage difference between the pixel electrodes 191c, the first, second, and third sub-pixel electrodes 191a, 191b, and 191c have different voltages to exhibit three gradations, thereby improving side visibility .

The first, second, and third storage electrode lines 131a, 131b, and 131c are spaced apart from the first gate line 121a. The first, second, and third storage electrode lines 131a, 131b, . At this time, the first, second, and third sustain electrode lines 131a, 131b, and 131c may be formed in the same layer as the first gate line 121a. The first, second, and third sustain electrode lines 131a, 131b, and 131c include first, second, third, and fourth sustain electrodes 133a, 133b, 133c, and 133d extending therefrom.

As in the first embodiment, the second sustain electrode 133b is formed in a direction parallel to the first gate line 121a so as to overlap with the center of the first sub-pixel electrode 191a, and the first sub-pixel electrode 191a ). ≪ / RTI > The second sustain electrode line 131b is formed in a direction parallel to the first gate line 121a so as to overlap the central portion of the second sub-pixel electrode 191b, and the texture generated in the second sub- You can hide it.

Next, a liquid crystal display according to a sixth embodiment of the present invention will be described with reference to the accompanying drawings.

The greatest difference from the fifth embodiment is that the second sustain electrode line and the third sustain electrode included in the fifth embodiment are not formed in the sixth embodiment, and will be described in more detail below.

10 is a layout diagram of a lower panel of a liquid crystal display according to a sixth embodiment of the present invention.

Since the liquid crystal display according to the sixth embodiment of the present invention is the same as the liquid crystal display according to the fifth embodiment, description thereof will be omitted and only differences will be described below.

The liquid crystal display according to the sixth embodiment of the present invention is formed with first and third sustain electrode lines 131a and 131c spaced apart from the first gate line 121a as shown in FIG. The first and third sustain electrode lines 131a and 131c are applied with a predetermined voltage and extend substantially in parallel with the first gate line 121a. In addition, the first, second, and fourth sustain electrodes 133a, 133b, and 133d are formed at the same positions as in the fifth embodiment, and their shapes and arrangements can be modified in various ways.

At this time, since the second sustain electrode 133b is formed so as to cover the horizontal line portion crossing the center of the first sub-pixel electrode 191a, it is possible to prevent the influence due to the texture generated in the first sub-pixel electrode 191a have.

In the liquid crystal display device according to the sixth embodiment of the present invention, since the sustain electrode line is not formed to cross the center portion of the second sub-pixel electrode 191b, the second sub-pixel electrode 191b As the area is reduced, the transmittance can be further increased.

Next, a liquid crystal display according to a seventh embodiment of the present invention will be described with reference to the accompanying drawings.

The main difference from the fifth embodiment lies in that a sustain electrode covering a part of the third sub-pixel electrode 191c is further formed in the seventh embodiment, which will be described in more detail below.

11 is a layout diagram of a lower panel of a liquid crystal display according to a seventh embodiment of the present invention.

The liquid crystal display device according to the seventh embodiment of the present invention is the same as the liquid crystal display device according to the fifth embodiment, and a description thereof will be omitted and only differences will be described below.

11, the first, second, and third sustain electrode lines 131a, 131b, and 131c are formed apart from the first gate line 121a. do. The first, second, and third sustain electrode lines 131a, 131b, and 131c receive a predetermined voltage and extend substantially in parallel with the first gate line 121a. In addition, the first, second, third, and fourth sustain electrodes 133a, 133b, 133c, and 133d are formed at the same positions as in the fifth embodiment, and their shapes and arrangements can be modified in various ways.

Furthermore, the fifth sustain electrode 133e is formed in a direction parallel to the first gate line 121a so as to overlap the central portion of the third sub-pixel electrode 191c. The fifth sustain electrode 133e is formed to connect the fourth sustain electrode 133d formed on the left side of the third sub-pixel electrode 191c and the fourth sustain electrode 133d formed on the right side.

The fifth sustain electrode 133e may be formed to overlap at least a part of either the left or right end of the third sub-pixel electrode 191c. At this time, the fifth sustain electrode 133e is formed to be connected to the fourth sustain electrode 133d formed on only one side.

In the liquid crystal display device according to the third embodiment of the present invention, the fifth sustain electrode 133e is formed so as to cross the center of the third sub-pixel electrode 191c, Can be prevented.

Next, a liquid crystal display according to an eighth embodiment of the present invention will be described with reference to the accompanying drawings.

The fifth embodiment is different from the fifth embodiment in that the second sustain electrode line and the third sustain electrode included in the fifth embodiment are not formed in the eighth embodiment, Electrode is additionally formed, which will be described in more detail below.

12 is a layout diagram of a lower panel of a liquid crystal display according to an eighth embodiment of the present invention.

Since the liquid crystal display according to the eighth embodiment of the present invention is the same as the liquid crystal display according to the fifth embodiment, description thereof will be omitted and only differences will be described below.

12, the liquid crystal display according to the eighth embodiment of the present invention includes first and third sustain electrode lines 131a and 131c spaced apart from the first gate line 121a. The first and third sustain electrode lines 131a and 131c are applied with a predetermined voltage and extend substantially in parallel with the first gate line 121a. In addition, the first, second, and fourth sustain electrodes 133a, 133b, and 133d are formed at the same positions as in the fifth embodiment, and their shapes and arrangements can be modified in various ways.

Furthermore, the fifth sustain electrode 133e is formed in a direction parallel to the first gate line 121a so as to overlap the central portion of the third sub-pixel electrode 191c. The fifth sustain electrode 133e is formed to connect the fourth sustain electrode 133d formed on the left side of the third sub-pixel electrode 191c and the fourth sustain electrode 133d formed on the right side.

The fifth sustain electrode 133e may be formed to overlap at least a part of either the left or right end of the third sub-pixel electrode 191c. At this time, the fifth sustain electrode 133e is formed to be connected to the fourth sustain electrode 133d formed on only one side.

In the liquid crystal display device according to the eighth embodiment of the present invention, the second sustain electrode 133b and the fifth sustain electrode 133e are connected to a horizontal line portion extending across the center of the first and third sub-pixel electrodes 191a and 191c, The influence due to the texture generated in the first and third sub-pixel electrodes 191a and 191c can be prevented.

In the liquid crystal display according to the fifth to eighth embodiments of the present invention, the first, second, and third sub-pixel electrodes have different voltages to represent three gradations. In the above embodiments, the voltage of the first sub-pixel electrode is higher than the voltage of the second sub-pixel electrode, and the voltage of the second sub-pixel electrode is higher than the voltage of the third sub-pixel electrode.

The voltage ratio of the first, second, and third sub-pixel electrodes is preferably 1: 0.6 or more and 0.9 or less: 0.5 or more and 0.9 or less. The area ratio of the first, second, and third sub-pixel electrodes is preferably 1: 0.8 or more and 2.5 or less: 0.8 or more and 5 or less.

In the liquid crystal display device according to the first to fourth embodiments of the present invention, the first sub-pixel electrode having the highest voltage is arranged on the uppermost side, and the second and third sub-pixel electrodes are arranged on the lower side in order. However, the present invention is not limited to this, and the arrangement of the first, second, and third sub-pixel electrodes may be variously changed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

121a: first gate line 121b: second gate line
124a: first gate electrode 124b: second gate electrode
124c: third gate electrode 131a: first sustain electrode line
131b: second sustain electrode line 131c: third sustain electrode line
133a: first sustain electrode 133b: second sustain electrode
133c: third sustain electrode 133d: fourth sustain electrode
133e: fifth sustain electrode 171: data line
173a: first source electrode 173b: second source electrode
173c: third source electrode 175a: first drain electrode
175b: second drain electrode 175c: third drain electrode
181a: first contact hole 181b: second contact hole
181c: third contact hole 191a: first sub-pixel electrode
191b: second sub-pixel electrode 191c: third sub-pixel electrode

Claims (20)

A first substrate;
A first gate line, a second gate line, and a data line formed on the first substrate;
A first switching element and a second switching element connected to the first gate line and the data line;
A third switching element connected to the second gate line, the data line and the second switching element, a first sub-pixel electrode connected to the first switching element,
A second sub-pixel electrode connected to the second switching element;
A third sub-pixel electrode forming the third switching element and a transformer capacitor;
A second sustain electrode formed to overlap with a central portion of the first sub-pixel electrode;
A second substrate;
A common electrode formed on the second substrate; And
And a liquid crystal layer formed between the first substrate and the second substrate,
And a liquid crystal capacitor is formed between the transformer capacitor and the common electrode.
Liquid crystal display device.
The method according to claim 1,
Wherein the second sustain electrode is formed in the same direction as the first gate line,
Liquid crystal display device.

3. The method of claim 2,
Further comprising a first sustain electrode formed to overlap with at least one of left and right ends of the first sub-pixel electrode and connected to the second sustain electrode,
Liquid crystal display device.
The method of claim 3,
Further comprising a first sustain electrode line formed on the first sub-pixel electrode and connected to the first sustain electrode,
Liquid crystal display device.
5. The method of claim 4,
And a second sustain electrode line formed to overlap the central portion of the second sub-pixel electrode.
Liquid crystal display device.
6. The method of claim 5,
And the second sustain electrode line is formed in the same direction as the first gate line.
Liquid crystal display device.
The method according to claim 6,
And a third sustain electrode protruding from the second sustain electrode line and overlapping with at least one of left and right end portions of the second sub-pixel electrode.
Liquid crystal display device.
8. The method of claim 7,
And a fifth sustain electrode formed to overlap the central portion of the third sub-pixel electrode.
Liquid crystal display device.
9. The method of claim 8,
And the fifth sustain electrode is formed in the same direction as the second gate line.
Liquid crystal display device.
10. The method of claim 9,
Further comprising a fourth sustain electrode formed to overlap with at least one of left and right ends of the third sub-pixel electrode and connected to the fifth sustain electrode,
Liquid crystal display device.
11. The method of claim 10,
And a third sustain electrode line formed below the third sub-pixel electrode and connected to the fourth sustain electrode.
Liquid crystal display device.
5. The method of claim 4,
A third sustain electrode line formed below the third sub-pixel electrode;
A fourth sustain electrode overlapping at least one of the left and right ends of the third sub-pixel electrode and connected to the third sustain electrode line; And
And a fifth sustain electrode overlapped with a central portion of the third sub-pixel electrode and connected to the fourth sustain electrode and formed in the same direction as the second gate line.
Liquid crystal display device.
3. The method of claim 2,
The second gate line is located below the first gate line,
Wherein the first sub-pixel electrode is located above the first gate line,
The second sub-pixel electrode is located below the first gate line and above the second gate line,
And the third sub-pixel electrode is located below the second gate line,
Liquid crystal display device.
The method according to claim 1,
The voltage of the first sub-pixel electrode is higher than the voltage of the second sub-pixel electrode,
Wherein the voltage of the second sub-pixel electrode is higher than the voltage of the third sub-
Liquid crystal display device.
15. The method of claim 14,
Wherein the voltage ratio of the first sub-pixel electrode, the second sub-pixel electrode, and the third sub-pixel electrode is 1: 0.6 or more and 0.9 or less: 0.5 or more and 0.9 or less,
Liquid crystal display device.
15. The method of claim 14,
Wherein an area ratio of the first sub-pixel electrode, the second sub-pixel electrode, and the third sub-pixel electrode is 1: 0.8 or more and 2.5 or less: 0.8 or more and 5.0 or less,
Liquid crystal display device.
The method according to claim 1,
A first alignment layer formed on the first substrate by irradiating light in different directions; And
And a second alignment layer formed on the second substrate by irradiating light in different directions,
Wherein the second sustain electrode is at least partially overlapped with a texture generated by irradiating the first alignment layer and the second alignment layer with light in different directions,
Liquid crystal display device.
A first substrate;
A gate line and a data line formed on the first substrate;
A first switching element and a second switching element connected to the gate line and the data line;
A third switching element connected to the floating control terminal, the data line, and the second switching element;
A first sub-pixel electrode connected to the first switching device;
A second sub-pixel electrode connected to the second switching element;
A third sub-pixel electrode forming the third switching element and a transformer capacitor;
A second sustain electrode formed to overlap with a central portion of the first sub-pixel electrode;
A second substrate;
A common electrode formed on the second substrate; And
And a liquid crystal layer formed between the first substrate and the second substrate,
The second sustain electrode extends in the same direction as the gate line,
And a liquid crystal capacitor is formed between the transformer capacitor and the common electrode.
19. The method of claim 18,
A first sustain electrode formed to overlap with at least one of left and right ends of the first sub-pixel electrode and connected to the second sustain electrode; And
Further comprising a first sustain electrode line formed on the first sub-pixel electrode and connected to the first sustain electrode,
Liquid crystal display device.
20. The method of claim 19,
A second sustain electrode line formed to overlap the central portion of the second sub-pixel electrode; And
Further comprising a third sustain electrode protruding from the second sustain electrode line and overlapping with at least one of left and right end portions of the second sub-pixel electrode,
The second sustain electrode line is formed in the same direction as the gate line,
Liquid crystal display device.

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